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TM 5-4210-230-14&P-1
3.
Prime the water pump (refer to para. 1)
4.
Connect the discharge hose to the required discharge outlet, and open corresponding discharge valve.
5.
Increase engine speed using the throttle (16, Fig. 3) until the desired pump pressure is shown on the master
pump pressure gauge (1 Fig. 3).
NOTE
If the master pump gauge (1, Fig. 3) registers vacuum before the desired pressure is reached, it is draining
more water than the hydrant can supply. Close the nozzle or use a smaller tip to obtain more pressure.
CAUTION
When pumping from a hydrant, the Master pump gauge must register 5 PSI or serious damage may occur
in the water pump.
C.
Pumping water from an open body of water.
1.
Start engine (refer to section 1).
2.
Use 2 1/2" suction line to supply water to the fire truck, connect hose and make sure connections are tight.
3.
Before operating from a suction lift, see that the strainer at the lower end of the suction hose is at least two
feet below the water surface. To avoid draining air, the strainer should not rest on the bottom to prevent
pumping sand and foreign matter.
WARNING
Excessive sand and foreign matter in water pump will eventually effect pump efficiency.
4.
Prime the water pump (refer to para 1).
5.
Connect the discharge hose to the required discharge outlet, and open corresponding discharge valve.
6.
Increase engine speed using the throttle (16, Fig. 3) until the desired pump pressure is shown on the master
pump pressure gauge (1, Fig. 3).
4-4
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